The Rubis Ion is an antibacterial-coated pair of tweezers which allows both precise and also hygienic use. The special coating releases silver ions that neutralize bacteria, germs and other pathogens. You benefit from considerably more hygiene. The slanted classic tweezers are to trim your eyebrows. We recommend that you always use the protective cap provided when storing your Rubis tweezers after use. We doe not recommend sterilizing coated tweezers with chemicals. Wash with mild soap and water. Every pair of Rubis tweezers is handmade and although the tips are durable, their functionality may be compromised if the tweezers accidentally falls to the ground.